IMPORTANT: Make sure to scale the model down a bit in your slicer of choice. I didn't want to fiddle with the dimensions trying to get a perfect fit, so once I got it close enough. I just scaled it down a bit. Scaling it to 96% worked for me but your results may vary. Make some test prints to ensure a good fit.
The author remixed this model.
I modified the cup to hold the larger 15ml oils since the original model was only intended to hold the smaller ones.